Dynamic System Stability Modeling Approach with Sparrow-Inspired Meta-Heuristic Optimization Algorithm [PDF]
Biomimetics, 2023 Aiming at the accurate prediction of the inception of instability in a compressor, a dynamic system stability model is proposed based on a sparrow-inspired meta-heuristic optimization algorithm in this article.
Tianqi Xia +2 more
doaj +2 more sources
Aerodynamic System Machine Learning Modeling with Gray Wolf Optimization Support Vector Regression and Instability Identification Strategy of Wavelet Singular Spectrum [PDF]
Biomimetics, 2023 The prediction of a stall precursor in an axial compressor is the basic guarantee to the stable operation of an aeroengine. How to predict and intelligently identify the instability of the system in advance is of great significance to the safety ...
Mingming Zhang +5 more
doaj +2 more sources
Active Suppression of Rotating Stall Inception with Distributed Jet Actuation [PDF]
International Journal of Rotating Machinery, 2007 An analytical and experimental investigation of the effectiveness of full-span distributed jet actuation for active suppression of long length-scale rotating stall inception is carried out.
Huu Duc Vo
doaj +2 more sources
Physics of Prestall Propagating Disturbances in Axial Compressors and Their Potential as a Stall Warning Indicator [PDF]
Applied Sciences, 2017 Axial compressors in aero engines are prone to suffering a breakdown of orderly flow when operating at the peak of the pressure rise characteristic. The damaging potential of separated flows is why a safe distance has to be left between every possible ...
Mario Eck, Silvio Geist, Dieter Peitsch
doaj +4 more sources
Influence of axial spacing on stall development of FBCDZ-10-No20 mode contra-rotating fan
Meitan kexue jishu, 2023 The rotating fan is prone to instability such as stall and even surge when operating at low flow rates. In order to study the influence of axial spacings on the stall inception and its development and propagation process of a contra-rotating fan , a ...
Qingguang CHEN +3 more
doaj +1 more source
AIP Advances, 2023 This paper aims at the numerical analysis of the influence of tip clearance size on the pre-stall flow features of a transonic high-speed compressor by applying the throttle model at the exit of the compressor computational domain.
Khalid Kamal Abdelbagi
doaj +1 more source
Stall Inception in Low-Pressure Ratio Fans [PDF]
Journal of Turbomachinery, 2018 A combined experimental and computational test program, with two low-pressure ratio aero-engine fans, has been used to identify the flow mechanisms at stall inception and the subsequent stall cell growth. The two fans have the same rotor tip clearance, annulus design, and downstream stators, but different levels of tip loading.
Kim, Semi +5 more
openaire +2 more sources
Effect of axial spacing on rotating stall performance of FBCDZ-10-No20 contra-rotating fan
Meitan kexue jishu, 2023 Mining contra-rotating fan are prone to rotational stall when it operates at low flow rates, which seriously affects the operational stability. The unsteady flow in the full flow passage of a FBCDZ-10-No20 contra-rotating fan at five axial spacings was ...
Qingguang CHEN +3 more
doaj +1 more source
Estimations of Compressor Stall and Surge Using Passage Stall Behaviors
Machines, 2022 The predictions of the onset of rotating stall and surge are very important in the preliminary design stage of a compressor. Rotating stall and surge are complex instabilities that cause efficiency loss and reduced pressure rise, and, therefore ...
Mohammad Akhlaghi +2 more
doaj +1 more source
Origins and Structure of Spike-Type Rotating Stall [PDF]
, 2018 In this paper we describe the structures that produce a spiketype route to rotating stall and explain the physical mechanism for their formation. The descriptions and explanations are based on numerical simulations, complemented and corroborated by ...
Day, I. J. +4 more
core +4 more sources